#[repr(transparent)]pub struct Language { /* private fields */ }
Expand description
Implementations§
source§impl Language
impl Language
sourcepub unsafe fn from_glib_ptr_borrow<'a>(
ptr: *const *const PangoLanguage
) -> &'a Self
pub unsafe fn from_glib_ptr_borrow<'a>( ptr: *const *const PangoLanguage ) -> &'a Self
Borrows the underlying C value.
sourcepub unsafe fn from_glib_ptr_borrow_mut<'a>(
ptr: *mut *mut PangoLanguage
) -> &'a mut Self
pub unsafe fn from_glib_ptr_borrow_mut<'a>( ptr: *mut *mut PangoLanguage ) -> &'a mut Self
Borrows the underlying C value mutably.
source§impl Language
impl Language
sourcepub fn sample_string(&self) -> GString
pub fn sample_string(&self) -> GString
Get a string that is representative of the characters needed to render a particular language.
The sample text may be a pangram, but is not necessarily. It is chosen to be demonstrative of normal text in the language, as well as exposing font feature requirements unique to the language. It is suitable for use as sample text in a font selection dialog.
If @self is None
, the default language as found by
default()
is used.
If Pango does not have a sample string for @self, the classic “The quick brown fox…” is returned. This can be detected by comparing the returned pointer value to that returned for (non-existent) language code “xx”. That is, compare to:
pango_language_get_sample_string (pango_language_from_string ("xx"))
Returns
the sample string
sourcepub fn includes_script(&self, script: Script) -> bool
pub fn includes_script(&self, script: Script) -> bool
Determines if @script is one of the scripts used to write @self.
The returned value is conservative; if nothing is known about
the language tag @self, true
will be returned, since, as
far as Pango knows, @script might be used to write @self.
This routine is used in Pango’s itemization process when determining if a supplied language tag is relevant to a particular section of text. It probably is not useful for applications in most circumstances.
This function uses scripts()
internally.
script
a Script
Returns
true
if @script is one of the scripts used
to write @self or if nothing is known about @self
(including the case that @self is None
), false
otherwise.
sourcepub fn matches(&self, range_list: &str) -> bool
pub fn matches(&self, range_list: &str) -> bool
Checks if a language tag matches one of the elements in a list of language ranges.
A language tag is considered to match a range in the list if the range is ‘*’, the range is exactly the tag, or the range is a prefix of the tag, and the character after it in the tag is ‘-’.
range_list
a list of language ranges, separated by ‘;’, ‘:’,
‘,’, or space characters.
Each element must either be ‘*’, or a RFC 3066 language range
canonicalized as by from_string()
Returns
true
if a match was found
sourcepub fn to_str(&self) -> GString
pub fn to_str(&self) -> GString
Gets the RFC-3066 format string representing the given language tag.
Returns (transfer none): a string representing the language tag
sourcepub fn from_string(language: &str) -> Language
pub fn from_string(language: &str) -> Language
Convert a language tag to a Language
.
The language tag must be in a RFC-3066 format. Language
pointers
can be efficiently copied (copy the pointer) and compared with other
language tags (compare the pointer.)
This function first canonicalizes the string by converting it to lowercase, mapping ‘_’ to ‘-’, and stripping all characters other than letters and ‘-’.
Use default()
if you want to get the
Language
for the current locale of the process.
language
a string representing a language tag
Returns
a Language
sourcepub fn default() -> Language
pub fn default() -> Language
Returns the Language
for the current locale of the process.
On Unix systems, this is the return value is derived from
setlocale (LC_CTYPE, NULL)
, and the user can
affect this through the environment variables LC_ALL, LC_CTYPE or
LANG (checked in that order). The locale string typically is in
the form lang_COUNTRY, where lang is an ISO-639 language code, and
COUNTRY is an ISO-3166 country code. For instance, sv_FI for
Swedish as written in Finland or pt_BR for Portuguese as written in
Brazil.
On Windows, the C library does not use any such environment variables, and setting them won’t affect the behavior of functions like ctime(). The user sets the locale through the Regional Options in the Control Panel. The C library (in the setlocale() function) does not use country and language codes, but country and language names spelled out in English. However, this function does check the above environment variables, and does return a Unix-style locale string based on either said environment variables or the thread’s current locale.
Your application should call setlocale(LC_ALL, "")
for the user
settings to take effect. GTK does this in its initialization
functions automatically (by calling gtk_set_locale()).
See the setlocale() manpage for more details.
Note that the default language can change over the life of an application.
Also note that this function will not do the right thing if you use per-thread locales with uselocale(). In that case, you should just call pango_language_from_string() yourself.
Returns
the default language as a Language
sourcepub fn preferred() -> Vec<Language>
Available on crate feature v1_48
only.
pub fn preferred() -> Vec<Language>
v1_48
only.Returns the list of languages that the user prefers.
The list is specified by the PANGO_LANGUAGE
or LANGUAGE
environment variables, in order of preference. Note that this
list does not necessarily include the language returned by
default()
.
When choosing language-specific resources, such as the sample
text returned by sample_string()
,
you should first try the default language, followed by the
languages returned by this function.
Returns
source§impl Language
impl Language
sourcepub fn scripts(&self) -> Vec<Script>
pub fn scripts(&self) -> Vec<Script>
Determines the scripts used to to write @self.
If nothing is known about the language tag @self,
or if @self is None
, then None
is returned.
The list of scripts returned starts with the script that the
language uses most and continues to the one it uses least.
The value @num_script points at will be set to the number
of scripts in the returned array (or zero if None
is returned).
Most languages use only one script for writing, but there are
some that use two (Latin and Cyrillic for example), and a few
use three (Japanese for example). Applications should not make
any assumptions on the maximum number of scripts returned
though, except that it is positive if the return value is not
None
, and it is a small number.
The includes_script()
function uses this
function internally.
Note: while the return value is declared as Script
, the
returned values are from the GUnicodeScript
enumeration, which
may have more values. Callers need to handle unknown values.
Returns
An array of Script
values, with the number of entries in
the array stored in @num_scripts, or None
if Pango does not have
any information about this particular language tag (also the case
if @self is None
).
Trait Implementations§
source§impl HasParamSpec for Language
impl HasParamSpec for Language
source§impl Ord for Language
impl Ord for Language
source§impl PartialEq<Language> for Language
impl PartialEq<Language> for Language
source§impl PartialOrd<Language> for Language
impl PartialOrd<Language> for Language
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for Language
impl StaticType for Language
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Language
impl Send for Language
impl StructuralEq for Language
impl StructuralPartialEq for Language
impl Sync for Language
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